I uploaded several avatar's and none will show up. I'm pretty sure they were the correct size too.  Help!? Suggestions?!?

By correct size do you mean kb and pixels?  There's a 75 x 75 pixel limit, and that's what held me up.  I kept aiming for the right file size but couldn't get my picture in until I went into paint and reduced it to the right picture size.  If you haven't tried that yet, open your picture with paint and resize the overall boundaries so that there's no white around your picture.  Then up in the toolbar go to Image, then Attributes, and there should be the option of resizing to the desired number of pixels.  Hope that helps!

You can also upload the pic into photobucket.com and resize it that way.  It's very user-friendly.